Vuuwgitapii co



G. W. JACKSON. BUCKET STRUCTURE FOR EXCAVATING AND [IKE MACHINES.

- APPLICATION flLill 1MB. 25.1918. 1,3 13,220. Patented Aug. 12, 1919.

3 SHEETS-SHEET I.

nrun THE COLUMBIA mm 60-, 'umm'mn, D. 6'

, G. W. IACKSON. BUCKET STRUCTURE FOR EXCAVATTNG AND LIKE MACHINES.

APPLICATION FILED MAR. 25. IQB. 1,313,220. Patented Aug. 12, 1919.

3 SHEETS-SHEET 2.

Ge 0 .Jwo/ssom 1 III Tun COLUMBIA PLANOGRAPH cm. WASHINGTON. n. c.

Patented Aug. 12, 1919.

3 SHEETS-SHEET 3.

APPLICATION FILED MAR. 25.1918

TH. WWII-ll PLANMIAPI! n10 WMIIIIIYI'ON, D. C

UNITED STATES "PATENT OFFICE.

GEORGE w. JACKSON, or cracke itmnorafnssmnon, nyfnnsivninssxennnn'rs, T0

AMERICAN POWER snovnn COMFANY, of MiLwA Knn; A con-gromrxon or wrsconsnv p 7 1 l BUCKET 'srnncrunn iz'on 'nxenvitrine AND mam mam.

To all whom it may concern Be it known that I, Gnonen W. JACKSON, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bucket Structures for Excavating and like Machines; azndldo hereby declare that the following isa full; clear, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification. V

This invention relates to improvements in bucket structures for conveyers and refers more particularly to buckets designed for use on machines for picking up loose'materials from' one point and conveying them back to a point of discharge.

An object of the invention is to produce an exceedingly strong and rugged construction to adapt the structure for handling heavy coarse materials, and to adapt the structure also for cutting and removing solid substances, such as earth, in the digging of trenches, ores inmining, and all kinds of material, excepting solid stone formation in. excavating tunnels, and to Provide'a. bucket structure adapted to this work which is very flexible to adapt it to a supportlng boom of an excavating or loading machine. f 7

Another object of the invention is to'pro;-

other bucket portion substituted thereior te. thereby vary the capacity of .the bucket. Also this arrangement permitsready repair in the event of breakage. V 7

Another object of the invention is to provide a novel connection between the links or sections of the bucket cover. 7

Another object of the invention is'to so adapt the boom to the buckets as to avoid loss of material from the ends of the buckets. I 7

pierced to receive bolts 21 that extend: also through. openings22 in the back eithe K rt Other objects of the invention are to im prove and simplifybncket structures of the,

character set forth, 'andfthe inventioncons sists in the combination and arrangement ofv Figure 1 is a sideiview of a boom showing 7 "*materiai.

my improved bucket structure thereon.

spe ineati iiai Letterslatent. Patented Aug. 12, 1919. Application filed March'25, 1918. SerialNoJ22-1A39.

Fig. 2 is a cross section Eon the line 2-2 ofFigJl. J

Fig. 3 is a perspective-view. of one of the bucket parts; 4 i

. Fig. 4 is an enlarged section of a series of buckets atone-end of the boom. 1 Fig. 5 is 'a'horizontal section through a. series of articulated bn'cket sections, looking downwardly. 1 r

Fig. 6 is a bottom plan view of the parts shown in Fig. 5 with parts in section.

Fig. 7 is a top perspective view of one of the bucket links or sections. 7

The boom 10 shown is ofthat type employed in the loading or exeavatin machine shown in my prior application or U. S. Letters Patent, Serial N 0. 195,213, filed October 8, 1917. It comprises in general terms two curved side channel members 11, 11 which are adapted to be transversely connected in any known way to produce a solid boom. The construction of the boom is-fnot important in respect of this invention and is not, therefore, detailed, fexcept to'show tension means 12 for properly to l ioning the endless bucket structure mounted thereon.

endless bucket structure, comprises a. series pf transverse, articulated bucket structures, each consisting of slink or section 14, best shown in Fig. 7, and a detachable part I bucket 15, best shown in Fig. 3. The bucket part shown in Fig. .3 comprises what may be termed the biting wall 16 of the bucket and end walls 17 17 thereof, and the links or sections 14 comprises, when'the parts are as-.

sembled, the base wall of the bucket. The

a k or r e fions are pr v d on he r ppe a g r rd tatt e uc ets in. he upp ap irt endless truc ur w th upstanding fiangeslS, 18 at their ends and. an intermediate flange 19 at their rearedges, and the'end Walls ofthe part buckets are provided with inset extensions 19 which overlap the end flanges 18, and said parts are pierced to receive bolts 20 to detachably fasten themltogether. The lugs 19 are also bucketsto further secure the parts toget er. I

.The links or. sections 14 are preferably made of anysuitable cast material, although for someuses they may be {made of pressed or stamped material. For heavy duty they shoulrl'rbeanadeof cast steel or equivalent" Said links or sections are transversely solid or continuous from end to end. Each link or section is provided on its lower surface with two pairs of transversely elongated lugs 23 which extend at their ends slightly beyond both side edges of the The lugs of each pair are offset between their ends so that they approach each other more closely at one 'side of the link or section than at the other side. With this arrangement it becomes practical to cast the pairs of lugs Symmetrical with respect to the links or sections, so that all of the links or sections may be cast from the same pattern, and to join or articulate said sections by entering the more closely spaced ends of the lugs of one section between the more widely spaced ends of the lugs of adjoining sections, as best shown in Fig. 6. Said lugs are loosely connected by bolts 24 which extend through registering apertures in the overlapping parts of the lugs. Preferably, and as herein shown, the hinge bolts extend through bushings 25 that are removably seated in the openings of the iugs so that when the hinged connections become unduly worn tlie bushings may be removed and other bushings substituted therefor. As herein shown, the ends of the lugs of each pair which are closer together are integrally conneetedby an enlargement or boss 26; and the lugs and connecting bosses are cast integral with the links or sections. The said lugs23, connected as shown by the bolts 24, constitute in effect chains, in the manner of sprocket chains, which travel about driving wheels or pulleys 13, one of which is shown in Fig. 4, the bosses 26 engaging with the teeth of the driving wheels or pulleys to afford a driving connection between the latter and the bucket structure.

The series of buckets constituting the bucket structure are supported at the upper lap thereof on the upper flange 11" of the boom through the medium of the ends of the links or sections 14, as best shown in Figs, '2 and 4. The-buckets are supported at the lower lap of the endless structure upon the lower flan 11" of the boom through the medium 0 laterally extending arms 27 made integral with the outer lugs 23, as best shown in Fig. 2. a

In order that the articulated bucket sections may have freedom of movement relatively to each other to permit the endless series to pass freely about the boom, the adjoining edge margins of said sections are complementally curved. As herein shown, the rear edges of the sections are curved upwardly as indicated at 28 and the forward edges thereofare curved downwardly, as indicated at 29. The bosses 26'which connect the lugs at their closely spaced ends are likewise downwardly curved to correspond to the adjacent curvature of the rear edge margins. The manner in which the complementally curved margins of the sections cooperate is indicated in Fig. 4.

As a further improvement, the boom is provided throughout the entire portion of its length which supports the upper lap of the beit and slightly beyond the lower end of the boom in that portion which supports the lower lap of the belt with an upstanding rim 30 which is bolted or otherwise socured to the boom and is shaped with an outstanding part 31 to extend around the ends of the links or sections 14 and terminates at its edges to conform to the general shape of the end walls 17 of the part buckets. In the present instance, said end walls flare outwardly and the rim likewise terminates in an outwardly flare.

It wiil be obvious that the structure described constitutes an exceedingly strong and rugged structure for the duty intended, and the structure is one which possesses all of the flexibility required so that it may be driven with an economic use of power. Further, the structure is one in which the capacity of the buckets may be readily varied and replacement of broken buckets easily made.

It is to be understood that the invention is not intended to be restricted to the particular details illustrated and described, except as to claims wherein said details are specifically set forth and as imposed by the prior art. For instance, the buckets may in some instances be made of one-piece structure instead of as shown.

I claim as my invention,-

An endless bucket structure for excavating machines comprising a plurality of longitudinal solid buckets, each bucket provided on its inner side with a plurality of pairs of spaced lugs which extend beyond the side edges of the buckets and are adapted for overlapping engagement with pairs of lugs of adjacent buckets, said lugs being made integral with the buckets, and readily detachable hinge means extending through and connecting the overlapping portions of said lugs the ends of the buckets being adapted in the up er la of the structure to bear upon an e evate supporting boom, and said lugs being provided with laterally extending arms to engage the boom and thereby support'the lower lap of the structure.

In testimony that I claim the foregoing as my invention, I hereunto append my signature at Chicago, Illinois, this twenty-third day of March, 1918.

GEORGE W. JACKSON.

00p!" of this patent may be obtained for five cents each, by addressing the flommissloner of Patents. Washington, D. 0." 

